fixed bug checking with_others for promo code when no existing code yet
fixed bug cannot complete 0 order
added currency as a CSS class
v0.11.3 -- version bump
added Complete button for order when amount reaches 0
fixed stock listing/item listing margin
v0.11.3b -- version bump
added currency CSS class for stock pricing
added code to prevent template error
v0.11.3c -- version bump
v0.11.3d -- added item edit in AdminCP
fixed useless popup buying user upgrade
v0.11.3e -- version bump
v0.11.3f -- fixed bug fetchPair
v0.11.3g -- added load_class support for bdShop_Helper_Stock_Pricings
added support for item_id parameter in buying item
v0.11.4 -- version bump
improved expired item clean up
updated coding convention
added conversation for item status change